(NBC News) -- A Denver pet treat maker is recalling dozens of different products --
from chicken jerky and pig ears to buffalo hearts -- because they might
be contaminated with salmonella.

It's the third recall since the
fall by Kasel Associated Industries and covers all products
manufactured at the Colorado facility from April 20 through Sept. 19,
2012. The firm previously declined to recall its treats, despite urging
from the federal Food and Drug Administration.

The recall is not
related to the FDA's ongoing investigation into pet illnesses and deaths
tied to chicken jerky pet treats made in China.

The Kasel recall
includes several popular brands, including items sold at Costco. Kasel
is recalling Boots & Barkley, BIXBI, Nature's Deli, Colorado
Naturals, Petco and Best Bully Stick items. The products include best
buy dates through Oct. 3, 2014.

The treats could be contaminated
with salmonella bacteria, which could lead to illness in pets -- and in
people who come in contact with the products or pets who've consumed
them. Symptoms of salmonella infection in pets include lethargy,
diarrhea or bloody diarrhea, fever and vomiting. Some pets will have
decreased appetite and no other signs.

Similar symptoms can
appear in humans. Salmonella infection typically causes illness that
lasts only a few days, but in young children, the elderly or those with
weakened immune systems, the infection can be severe and require
hospitalization.

The list of recalled products includes 48 separate items. For the full list, click here.